Foggybrain

2+ Year Member
Sep 13, 2017
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Which steps involved in the contraction of a skeletal muscle require binding and/or hydrolysis of ATP?



  1. Dissociation of myosin head from actin filament
  2. Attachment of myosin head to actin filament
Answer: 2 is correct. Why? My understanding is that when ATP is bound to myosin head = relaxed state
When ATP is hydrolysed to ADP + P, then the myosin head moves and binds to actin. Hence my answer was 4
Thanks
 
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Cornfed101

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Aug 10, 2017
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1586569688034.gif
I like this diagram. Step 3 on here matches answer #2. There are steps in between your current understanding. The way you explained it in OP it sounded like you were skipping from 2 to 4 on my diagram
 
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Foggybrain

2+ Year Member
Sep 13, 2017
53
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Status
  1. Pre-Medical
Great diagram. I see where my content gap is on this topic. Thank you for showing me this pic.
 

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